I just read Matthew 24 from beginning to end. And I can't recall Jesus saying He was coming back twice.
Did Jesus say he was coming back twice? No.
Did Jesus say he would keep His disciples safe from tribulation, peril, sword? I think it's a bit unrealistic to assume God will rapture away believers to escape tribulation, when day by day many Christians suffer and die for their faith in the world, and God doesn't rapture them?
While it was mentioned in a previous post that the post trib may leave someone to be unprepared and unready, Corrie Ten Boom in fact thought that the pre-trib rapture would leave the Church ill-prepared for witness under persecution:
The "witness under trial" issue was of major concern to evangelist
Corrie Ten Boom, whose family suffered in Nazi prison camps during
World War II for the crime of protecting Jews. Corrie Ten Boom preached that the Pre-Tribulation Rapture would leave the Christian church ill-prepared for witness under persecution, just as it had in China when
Mao Zedong rose to power, and warned that Pre-Tribulationism was the sort of false doctrine that Jesus warned about.
Realise that death for the believer, is an escape from tribulation....
Isa 57:1 The righteous one perishes, and no one lays it to heart, and merciful men are taken away; no one cares that the righteous is taken away from the face of evil.
Did God rapture Noah away to avoid the flood? Or did God provide a means of protection (the ark) through the flood? There is a difference.
Jesus spoke of false prophets coming in the churches of the believers
Check up the origins of the pre-trib rapture, which was apparently revealed to a young prophetess in Scotland in the Irvingite sect (the Catholic Apostolic Church). See below:
The teaching of a secret pretribulation rapture is a doctrine that never existed before 1830. Did the pretribulation rapture come into existence by a careful exegesis of Scripture? No. The first person to teach the doctrine was a young woman named Margaret Macdonald. Margaret was not a theologian or Bible expositor but was a prophetess in the Irvingite sect (the Catholic Apostolic Church). Christian journalist Dave MacPherson has written a book on the subject of the origin of the pre-tribulation rapture. He writes: “We have seen that a young Scottish lassie named Margaret Macdonald had a private revelation in Port Glasgow, Scotland, in the early part of 1830 that a select group of Christians would be caught up to meet Christ in the air
before the days of Antichrist. An eye-and-ear witness, Robert Norton M.D., preserved her handwritten account of her pre-trib rapture revelation in two of his books, and said it was the
first time anyone ever split the second coming into two distinct parts or stages. His writings, along with much other Catholic Apostolic Church literature, have been hidden many decades from the mainstream of Evangelical thought and only recently surfaced. Margaret’s views were well-known to those who visited her home, among them John Darby of the Brethren. Within a few months her distinctive prophetic outlook was mirrored in the September, 1830 issue of
The Morning Watch and the early Brethren assembly at Plymouth, England. Early disciples of the pre-trib interpretation often called it a new doctrine.”
2
http://www.reformedonline.com/view/reformedonline/rapture.htm